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PTFE (polytetrafluoroethylene) foaming coating finishing agent and preparation method of composite filter of coating thereof

A technology of foam coating and PTFE, which is applied in the field of preparation of PTFE foam coating finishing agent and its coated composite filter material, can solve the problem of inability to prolong the life of the filter material, complex preparation procedures, and inability to effectively isolate oxygen and moisture and other problems, to achieve the effects of prolonging the service life, simple preparation method, and low raw material cost

Inactive Publication Date: 2017-02-22
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used filter material coating materials have complicated preparation procedures, and cannot effectively isolate oxygen and moisture in the air, so that the life of the filter material cannot be extended.

Method used

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  • PTFE (polytetrafluoroethylene) foaming coating finishing agent and preparation method of composite filter of coating thereof
  • PTFE (polytetrafluoroethylene) foaming coating finishing agent and preparation method of composite filter of coating thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 800g of distilled water, 20g of NaOH, and 4g of penetrant into the beaker in sequence, and after fully stirring, put the filter material sample into the mixed solution, and place it in a constant temperature water bath at 55°C for 2 hours; The filter material is washed to neutral and dried in an oven at 100°C;

[0027] Add 2g of azodicarbonamide, 0.2g of zinc oxide, 150g of PTFE emulsion, 40g of acrylic resin, and 10g of water-based epoxy resin in proportion to another beaker, and stir evenly. Put the foaming coating solution in an oven at 160°C to foam at a foaming ratio of 1:4 to obtain a foaming coating finish;

[0028] The above-mentioned foam coating finishing agent is evenly coated on the upper surface of the filter material to obtain a foam-coated PTFE composite filter material;

[0029] The foam coating finishing agent is evenly coated on the surface of the filter material, forming a uniform and porous foam layer on the surface of the filter material, which...

Embodiment 2

[0032] Add 800g of distilled water, 40g of NaOH, and 12g of penetrant into the beaker in turn. After fully stirring, put the filter material sample into the mixed solution, and place it in a constant temperature water bath at 50°C for 3 hours; The filter material is washed to neutral, and dried in an oven at 110°C;

[0033] Add 6g of azodicarbonamide, 0.4g of zinc oxide, 130g of PTFE emulsion, 36g of acrylic resin, and 24g of water-based epoxy resin in proportion to another beaker, and stir evenly. Put the foaming coating solution in an oven at 140°C to foam at a foaming ratio of 1:3 to obtain a foaming coating finish;

[0034] The above-mentioned foam coating finishing agent is evenly coated on the upper surface of the filter material to obtain a foam-coated PTFE composite filter material;

[0035] The foam coating finishing agent is evenly coated on the surface of the filter material, forming a uniform and porous foam layer on the surface of the filter material, which impro...

Embodiment 3

[0038] Add 800g of distilled water, 30g of NaOH, and 6g of penetrant into the beaker in turn, and after fully stirring, put the filter material sample into the mixed solution, and place it in a constant temperature water bath at 70°C for 4 hours; The filter material is washed to neutral and dried in an oven at 120°C;

[0039] Add 4g of azodicarbonamide, 0.2g of zinc oxide, 140g of PTFE emulsion, 35g of acrylic resin, and 15g of water-based epoxy resin in proportion to another beaker, and stir evenly. Put the foaming coating solution in an oven at 180°C to foam at a foaming ratio of 1:6 to obtain a foaming coating finish;

[0040] The above-mentioned foam coating finishing agent is evenly coated on the upper surface of the filter material to obtain a foam-coated PTFE composite filter material;

[0041] The foam coating finishing agent is evenly coated on the surface of the filter material, forming a uniform and porous foam layer on the surface of the filter material, which imp...

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Abstract

The invention discloses a PTFT (polytetrafluoroethylene) foaming coating finishing agent and a preparation method of a composite filter and a coating; the PTFE foaming coating finishing agent is composed of foaming agent, zinc oxide, PTFE emulsion and reaction resin; the preparation method includes steps of orderly adding azodicarbonamide, zinc oxide, PTFE emulsion, acrylic resin, and waterborne epoxy resin in a beaker, and evenly mixing; placing the foaming coating fluid in an oven at 140-180 DEG C for foaming, and obtaining the foaming coating finishing agent. The foaming coating finishing agent can prepare the coating the coating PTFE composite filter and the foaming coating PTFE composite filter. Compared with the prior art, the coating finishing agent is simple in preparation method, low in raw material cost, and can be evenly coated on the surface of the filter; the filter also has the advantages of the PTFE fiber and PPS fiber at the same time; besides, the filter has the beneficial effects of oxidization resistance, high temperature resistance, and corrosive resistance.

Description

technical field [0001] The invention relates to a surface treatment agent, in particular to a preparation method of a PTFE foam coating finishing agent and a coated composite filter material. Background technique [0002] High-temperature flue gas often contains more oxygen, and the PTFE composite filter material is easily oxidized under the action of high-temperature oxygen for a long time, resulting in macromolecular chain breaks and fiber damage. At the same time, when the moisture content of the flue gas is high, the oxidizing gas in the flue gas is easy to combine with water, and condenses into acid dew on the surface of the fiber, which causes the PPS fiber in it to be oxidized and corroded, resulting in damage and failure of the filter bag. In addition, when the flue gas contains smoke and oil droplets, it is easy to bond with dust and other substances on the surface of the filter material, causing inconvenience in cleaning, affecting the filtration efficiency and sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B27/06B32B27/32B32B27/12B32B5/02B32B5/18
CPCB01D39/14B01D2239/0216B01D2239/0492B01D2239/10B32B5/02B32B5/18B32B27/06B32B27/12B32B27/322B32B2255/102B32B2255/26
Inventor 陆勤伟
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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